Comments

They are more expensive than the competition, but they are SIGNIFICANTLY more efficient at heat transfer than anyone elses tanks, including the tank within a tank designs.

If you do a search on this site I am sure you will see my opinion floating around.

Great product. Haven't really had an occasion to press the local rep for assistance to any degree, warranty wise.

It is the only tank I use.

ME

It's not so much a case of "You got what you paid for", as it is a matter of "You DIDN'T get what you DIDN'T pay for, and you're NOT going to get what you thought you were in the way of comfort". Borrowed from Heatboy.

The tank has a very low pressure drop on the boiler side. I have a 23 at my home, hooked up to a Prestige Solo 60 (yes, that's 60kBTU) and I'm using a 15-58 on low speed. Obviously, with 26 gallons of storage and 60kBTU I'm not swimming in hot water, but recovery is quick - because I'm maintaining a relatively high delta T across the boiler and flow is relatively low, hot water stacks at the top of the tank and the high efficiency coil makes sure that the domestic water leaving the tank is nice and hot, too. At least that's what I think is going on, but I could definitely see where overpumping could be counterproductive to recovery.

When I saw the problem, it was on cast iron boilers, which if allowed to cool down, will have to heat their castings before the hot water hits the coils, and you can see a lag in initial output. Such is the nature of the beast.

The other thing that will cause the lag is the use of the capillary tube temperature controller. I always use a thermistor that gives the boiler a faster call for heat.

Your milage may vary depending upon the configuration and control logic used.

ME

It's not so much a case of "You got what you paid for", as it is a matter of "You DIDN'T get what you DIDN'T pay for, and you're NOT going to get what you thought you were in the way of comfort". Borrowed from Heatboy.